Investigating the Effects of Light on Plant Growth: A Biology Practical Experiment

The video tutorial explores an experiment to study the effects of light on plant growth, focusing on mustard seedlings. It begins with forming a hypothesis based on photosynthesis, followed by setting up an experiment with controlled conditions. The experiment involves measuring seedling growth under different light intensities over a week. Results are analyzed using line graphs, showing that higher light intensity promotes faster growth. The tutorial concludes with a discussion on the experiment's limitations, such as water evaporation and temperature control.

What is the primary reason seedlings are hypothesized to grow faster in higher light intensity?

• More oxygen availability

• Better temperature control

• Higher glucose production

• Increased water absorption

What is the first step in setting up the experiment to test the hypothesis?

• Measure the height of seedlings

• Place seeds in direct sunlight

• Soak cotton wool in water

• Count the number of seedlings

How are the Petri dishes arranged to test different light conditions?

• All in direct sunlight

• One in sunlight, one in partial light, one in darkness

• All in complete darkness

• One in sunlight, two in darkness

What is the main conclusion drawn from the experiment's results?

• Light intensity does not affect seedling growth

• Partial light is the best for seedling growth

• Seedlings grow faster in higher light intensity

• Seedlings grow faster in complete darkness

What is one limitation of the experiment mentioned in the analysis?

• Inconsistent seed quality

• Difficulty in controlling temperature

• Inaccurate measurement tools

• Lack of water supply